Saturday, October 01, 2016

Elecraft KX3 and T1 Working Together

I did some testing this morning and once I figured it out I needed to document it for myself (and anyone else that's interested).

Attached to an 80m OCF Dipole antenna I tried the tuning sequence between an Elecraft KX3 QRP Transceiver and the Elecraft T1 pocket QRP Auto Tuner.

NOTE the SWR readings off my 80 OCF dipole are higher than normal and I'm fairly certain I know that some branches and leaves are to blame. Another job on my to-list this fall.

This combination actually works very well together even though most KX3 owners have gone the route of adding the internal KXAT3 tuner option. I was on a budget and ordered the KX3 as a kit with no options other than the hand mic. I intend to add options later as I can afford them. My hope was that my existing T1 tuner that I purchased for another QRP rig would integrate well enough with the KX3 that I could use them together until I purchased an internal KXAT3.

As you can see from the quick video demos they do work well together with a few button presses in the correct sequence.

1) Press and hold the PWR/TUNE button on the T1 until the solid green light appears, then release.
2) Within 3 seconds you must press and hold the XMIT/TUNE button on the KX3 until it switches into tuning mode and starts transmitting a CW tone.
3) The T1 tuner will instantly start working and the KX3 display starts showing you the SWR readings and the power output of the radio.
4) When the T1 stops chattering and the KX3 display shows the final SWR reading press and hold the XMIT/TUNE button again until the radio exits the tuning mode and stops transmitting tone.

On a good antenna the sequence is very quick. On a more challenging scenario like a long wire it can take more than 5 seconds to try various options until it settles on the best result.

No comments: